Is Splitting the Powerstone legal in Standard, Modern, and Commander?

Splitting the Powerstone is legal in: Modern, Pioneer, Legacy, Vintage, Commander.

Splitting the Powerstone

Q: What type of card is Splitting the Powerstone?

Splitting the Powerstone is a Sorcery. Its oracle text reads: "As an additional cost to cast this spell, sacrifice an artifact. Create two tapped Powerstone tokens. If the sacrificed artifact was legendary, draw a card. (The tokens are artifacts with "{T}: Add {C}. This mana can't be spent to cast a nonartifact spell.") *As the glowing stone broke apart, so too did the last shred of the brothers' bond.*"

Sorcery

As an additional cost to cast this spell, sacrifice an artifact.

Create two tapped Powerstone tokens. If the sacrificed artifact was legendary, draw a card. (The tokens are artifacts with ": Add . This mana can't be spent to cast a nonartifact spell.")